Immunogen sequence: SLSFMNPRLL DDVSFHPCIR FKRWESERVL SFIPPDGNFR LISYRVSSQN LVAIPVYVKH SISFKENSSC GRFDITIGPK QNMGKTIEGI TVTVHMPKVV LNMNLTPTQG SYTFDPVTKV LTWDVGKITP QKLPSLKGLV NLQSGAPKPE ENPSLNIQFK IQQLAISGLK VNRLDMYGEK YKPFKGVKYV TKAGKFQVRT; Positive Samp